from unittest.mock import AsyncMock, MagicMock, patch

import pytest


def _rule(rid, title, topic_id):
    r = MagicMock()
    r.id, r.title, r.topic_id = rid, title, topic_id
    r.statement = "FULL STATEMENT SHOULD NOT BE INJECTED"
    return r


def _note(nid, title):
    n = MagicMock()
    n.id, n.title = nid, title
    return n


# ─── knowledge auto-inject (Path A) ──────────────────────────────────────────


@pytest.mark.asyncio
async def test_get_autoinject_config_defaults_and_clamps():
    from scribe.services import plugin_context as pc

    # No settings stored → defaults.
    with patch.object(pc, "get_setting", AsyncMock(side_effect=lambda uid, k, d: d)):
        cfg = await pc.get_autoinject_config(1)
    assert cfg == {
        "enabled": pc.AUTOINJECT_DEFAULT_ENABLED,
        "threshold": pc.AUTOINJECT_DEFAULT_THRESHOLD,
        "top_k": pc.AUTOINJECT_DEFAULT_TOP_K,
    }

    # Out-of-range values are clamped; top_k capped at the hard ceiling.
    stored = {
        pc.AUTOINJECT_ENABLED_KEY: "false",
        pc.AUTOINJECT_THRESHOLD_KEY: "5",
        pc.AUTOINJECT_TOP_K_KEY: "999",
    }
    with patch.object(pc, "get_setting",
                      AsyncMock(side_effect=lambda uid, k, d: stored.get(k, d))):
        cfg = await pc.get_autoinject_config(1)
    assert cfg["enabled"] is False
    assert cfg["threshold"] == 1.0
    assert cfg["top_k"] == pc._AUTOINJECT_MAX_TOP_K


@pytest.mark.asyncio
async def test_build_autoinject_hint_disabled_returns_empty_and_skips_search():
    from scribe.services import plugin_context as pc
    search = AsyncMock()
    with patch.object(pc, "get_autoinject_config",
                      AsyncMock(return_value={"enabled": False, "threshold": 0.55, "top_k": 3})), \
         patch.object(pc, "semantic_search_notes", search), \
         patch.object(pc, "record_retrieval", MagicMock()):
        out = await pc.build_autoinject_hint(1, "anything")
    assert out["context"] == "" and out["note_ids"] == []
    search.assert_not_called()  # disabled → no retrieval at all


@pytest.mark.asyncio
async def test_build_autoinject_hint_titles_only_with_margin_gate():
    from scribe.services import plugin_context as pc
    # top=0.80; 0.74 within band (0.10), 0.61 outside → dropped.
    hits = [(0.80, _note(11, "Pool sizing decision")),
            (0.74, _note(22, "run_maintenance thresholds")),
            (0.61, _note(33, "unrelated-ish"))]
    rec = MagicMock()
    with patch.object(pc, "get_autoinject_config",
                      AsyncMock(return_value={"enabled": True, "threshold": 0.55, "top_k": 3})), \
         patch.object(pc, "semantic_search_notes", AsyncMock(return_value=hits)), \
         patch.object(pc, "record_retrieval", rec):
        out = await pc.build_autoinject_hint(1, "postgres pool", project_id=2,
                                             exclude_ids=[99])
    # Margin gate kept the top two, dropped the straggler.
    assert out["note_ids"] == [11, 22]
    assert '#11 "Pool sizing decision" (0.80)' in out["context"]
    assert "#33" not in out["context"]
    # Title-first: no body text, ever.
    assert "get_note(id)" in out["context"]
    # Telemetry fired with the auto_inject source and the full candidate set.
    rec.assert_called_once()
    assert rec.call_args.kwargs["source"] == "auto_inject"


@pytest.mark.asyncio
async def test_build_autoinject_hint_blank_query_returns_empty():
    from scribe.services import plugin_context as pc
    search = AsyncMock()
    with patch.object(pc, "get_autoinject_config",
                      AsyncMock(return_value={"enabled": True, "threshold": 0.55, "top_k": 3})), \
         patch.object(pc, "semantic_search_notes", search):
        out = await pc.build_autoinject_hint(1, "   ")
    assert out["context"] == ""
    search.assert_not_called()


@pytest.mark.asyncio
async def test_build_session_context_renders_titles_grouped_by_topic():
    rules = [
        _rule(1, "`dev` is home", 1),
        _rule(2, "Release — never without explicit request", 1),
        _rule(3, "No GitHub — Fabled-Git only", 2),
    ]
    with patch("scribe.services.plugin_context.rulebooks_svc.list_always_on_rules",
               AsyncMock(return_value=rules)), \
         patch("scribe.services.plugin_context._topic_titles",
               AsyncMock(return_value={1: "git-workflow", 2: "fabled-git"})):
        from scribe.services.plugin_context import build_session_context
        out = await build_session_context(user_id=7, project_id=0)

    ctx = out["context"]
    assert out["rule_count"] == 3
    assert out["project"] is None
    # Titles present, grouped under topic headings
    assert "### git-workflow" in ctx
    assert "### fabled-git" in ctx
    assert "- [1] `dev` is home" in ctx
    assert "- [3] No GitHub — Fabled-Git only" in ctx
    # Full statements must NOT be dumped (push channel injects titles only)
    assert "FULL STATEMENT SHOULD NOT BE INJECTED" not in ctx


@pytest.mark.asyncio
async def test_build_session_context_includes_project_when_scoped():
    project = MagicMock(id=2, title="FabledScribe", goal="ship it")
    with patch("scribe.services.plugin_context.rulebooks_svc.list_always_on_rules",
               AsyncMock(return_value=[_rule(1, "rule", 1)])), \
         patch("scribe.services.plugin_context._topic_titles",
               AsyncMock(return_value={1: "git-workflow"})), \
         patch("scribe.services.plugin_context.projects_svc.get_project",
               AsyncMock(return_value=project)), \
         patch("scribe.services.plugin_context.notes_svc.list_notes",
               AsyncMock(return_value=([], 4))):
        from scribe.services.plugin_context import build_session_context
        out = await build_session_context(user_id=7, project_id=2)

    assert out["project"] == {"id": 2, "title": "FabledScribe"}
    assert "## Active project: FabledScribe (id 2)" in out["context"]
    assert "Open todo tasks: 4" in out["context"]


@pytest.mark.asyncio
async def test_build_session_context_unbound_repo_emits_bind_hint():
    with patch("scribe.services.plugin_context.rulebooks_svc.list_always_on_rules",
               AsyncMock(return_value=[_rule(1, "rule", 1)])), \
         patch("scribe.services.plugin_context._topic_titles",
               AsyncMock(return_value={1: "git-workflow"})):
        from scribe.services.plugin_context import build_session_context
        out = await build_session_context(
            user_id=7, project_id=0, unbound_repo="host/owner/repo",
        )

    ctx = out["context"]
    assert out["project"] is None
    assert "## Repository not yet bound" in ctx
    assert 'bind_repo(repo_url="host/owner/repo"' in ctx
    # No project block when unbound.
    assert "## Active project" not in ctx


@pytest.mark.asyncio
async def test_build_process_manifest_renders_stub_specs():
    items = [
        {"id": 5, "title": "Drift Audit", "tags": [], "snippet": "Find drifted docs."},
        {"id": 9, "title": "DRY Pass", "tags": [], "snippet": ""},
    ]
    with patch("scribe.services.plugin_context.knowledge_svc.query_knowledge",
               AsyncMock(return_value=(items, 2))):
        from scribe.services.plugin_context import build_process_manifest
        out = await build_process_manifest(user_id=7)

    assert out["total"] == 2
    drift = out["processes"][0]
    assert drift["id"] == 5
    assert drift["name"] == "Drift Audit"
    assert drift["slug"] == "drift-audit"          # kebab-cased
    assert "Drift Audit" in drift["description"]   # auto-surface trigger
    assert "Find drifted docs." in drift["description"]  # preview folded in
    # No-snippet process still gets a usable description.
    assert "DRY Pass" in out["processes"][1]["description"]


@pytest.mark.asyncio
async def test_build_process_manifest_dedupes_slugs_and_skips_blank_titles():
    items = [
        {"id": 1, "title": "My Process", "tags": [], "snippet": "a"},
        {"id": 2, "title": "my process", "tags": [], "snippet": "b"},  # same slug
        {"id": 3, "title": "   ", "tags": [], "snippet": "skip me"},   # blank title
    ]
    with patch("scribe.services.plugin_context.knowledge_svc.query_knowledge",
               AsyncMock(return_value=(items, 3))):
        from scribe.services.plugin_context import build_process_manifest
        out = await build_process_manifest(user_id=7)

    slugs = [p["slug"] for p in out["processes"]]
    assert slugs == ["my-process", "my-process-2"]  # collision suffixed with id
    assert out["total"] == 2                          # blank-title entry dropped


@pytest.mark.asyncio
async def test_build_process_manifest_truncates_long_preview():
    items = [{"id": 1, "title": "Big", "tags": [], "snippet": "x" * 500}]
    with patch("scribe.services.plugin_context.knowledge_svc.query_knowledge",
               AsyncMock(return_value=(items, 1))):
        from scribe.services.plugin_context import build_process_manifest
        out = await build_process_manifest(user_id=7)

    assert "…" in out["processes"][0]["description"]
    assert "x" * 500 not in out["processes"][0]["description"]


@pytest.mark.asyncio
async def test_build_session_context_caps_length():
    many = [_rule(i, "x" * 200, 1) for i in range(200)]
    with patch("scribe.services.plugin_context.rulebooks_svc.list_always_on_rules",
               AsyncMock(return_value=many)), \
         patch("scribe.services.plugin_context._topic_titles",
               AsyncMock(return_value={1: "git-workflow"})):
        from scribe.services.plugin_context import build_session_context
        out = await build_session_context(user_id=7)

    assert len(out["context"]) <= 9000 + 60  # cap + truncation note
    assert "truncated" in out["context"]